Web Pop-up Window using jQuery

index.html

<div id="pop-up" class="pop-up hidden">
  <div class="pop-up-window" id="pop-up-window">
    <div id="pop-up-close" class="pop-up-close">✕</div>
    <div id="pop-up-content" class="pop-up-content">
    </div>
  </div>
</div>

<div class="pop-up-call" data-content="(some HTML)"></div>

script.js

$(function() {
  $('.pop-up-call').each(function(i, el) {
    $(el).click(function() {
      $('#pop-up').removeClass('hidden');
      $('#pop-up-window').addClass('pop-up-window-animate');
      $('#pop-up-content').html('<div style="display: flex; flex: 100%; width: 100%; height: 100%; align-items: center; justify-content: center;"><img src="https://i.stack.imgur.com/oQ0tF.gif" width="40px" alt="load"></div>');
      $.ajax({
        type: 'GET',
        url: el.dataset.content,
        timeout: 5000,
        success: function(data) {
          $('#pop-up-content').html(data);
        },
        error: function(a, b) {
          setTimeout(() => {
            $('#pop-up-close').click();
          }, 1000)
        }
      });
    });
  });
  $('#pop-up-close').click(function() {
    $('#pop-up-window').removeClass('pop-up-window-animate');
    setTimeout(() => {
      $('#pop-up-window').addClass('pop-up-window-close-animate');
    }, 200);
    setTimeout(() => {
      $('#pop-up-content').html("");
      $('#pop-up-window').removeClass('pop-up-window-close-animate');
      $('#pop-up').addClass('hidden');
    }, 1200);
  });
});

style.css

* {
  margin: 0;
  padding: 0;
}

.hidden {
  visibility: hidden;
}

.pop-up ::-webkit-scrollbar {
  width: 0px;
  background: transparent;
}

.pop-up {
  position: fixed;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background-color: rgba(32, 32, 32, 0.7);
  width: 100%;
  height: 100%;
  z-index: 1031;
}

.pop-up-window {
  width: 90%;
  height: 90%;
  padding: 15px;
  position: relative;
  overflow-y: scroll;
  scroll-bar-width: 0px;
  border-radius: 15px;
  box-sizing: border-box;
  background-color: #f9f9f9;
  box-shadow: 1px 1px 11px rgba(32, 32, 32, 0.5);
}

.pop-up-window-animate {
  animation: slide-in 1s ease-in-out both;
}

.pop-up-window-close-animate {
  animation: slide-in 1s ease-in-out;
  animation-direction: reverse;
  animation-fill-mode: forwards;
}

@keyframes slide-in {
  from {
    transform: translateY(-500px);
    opacity: 0;
  }

  to {
    transform: translateY(0px);
    opacity: 1;
  }
}

.pop-up-close {
  font-family: 'PT Sans', arial, serif;
  font-size: 1.1rem;
  font-weight: bold;
  color: rgb(140, 140, 140);
  float: right;
  cursor: pointer;
  display: sticky;
  padding: 3px 6px 3px 5px;
  border-radius: 4px;
  transition: background-color 0.5s ease-in-out;
}

.pop-up-close:hover {
  color: white;
  background-color: black;
}

.pop-up-content {
  clear: both;
}

.pop-up-call:hover {
  cursor: pointer;
}